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Elena-2011 [213]
3 years ago
14

Which size random sample is likely to provide the most trustworthy results?

Mathematics
2 answers:
irina1246 [14]3 years ago
8 0
A is your best answer. The more you have the better
podryga [215]3 years ago
5 0
50.
A bigger sample usually gives more trustworthy results.
You might be interested in
An economist for a sporting goods company estimates the revenue and cost functions for the production of a new snowboard. These
Vladimir79 [104]

Answer:

Between 1000 and 5000 snowboards will make the function AP(x) >0.

Step-by-step explanation:

Since x can only take possitive values, we have that AP(x) = P(x)/x > 0 if and only if P(x) > 0.

In order to find when P(x) > 0, we find the values from where it is 0 and then we use the Bolzano Theorem.

P(x) = R(x) - C(x) = -x²+10x - (4x+5) = -x²+6x - 5. the roots of P can be found using the quadratic formula:

r_1,r_2 = \frac{-6 ^+_- \sqrt{6^2-4*(-1)*(-5)} }{2*(-1)} = \frac{-6^+_-\sqrt{16}}{-2} = \{1, 5\}

Therefore, P(1) = P(5) = 0. Lets find intermediate values to apply Bolzano Theorem:

  • P(0) = -5 < 0 ( P is negative in (-∞ , 1) )
  • P(2) = -4+6*2-5 = 3 > 0 (P is positive in (1,5) )
  • P(6) = -36+36-5 = -5 < 0 (P is negative in (5, +∞) )

The production levels that make AP(x) >0 are between 1000 and 5000 snowboards (because we take x by thousands)

5 0
3 years ago
Calculate the perimeter of a rectangle which is eleven metres long and four metres wide.​
Leviafan [203]

Step-by-step explanation:

the formulae to find the perimeter of a rectangle is p = 2(l+w)

<em>where</em>

p= perimeter

L = length

W = width

just add the length and width {given in the question} , and multiply them by 2

answer: = 2(11+4)

= 2 × 15

= 30 m

6 0
3 years ago
The area of a soccer field at 7700 yd.². The width of the field is 70 yards. What is the perimeter of the field?
mario62 [17]
Since you know the area and the width, you can divide the area by the width to find the length. This gives you a length of 110 yards. To find the perimeter of the soccer field, you would add all the side lengths together. Since the width is 70, you would add 70 + 70, along with the length, 110 + 110. This gives you a perimeter of 360.
3 0
3 years ago
Leon drew AABC and ADEF so that ZA: LD, ZB: LE, AB = 4, and DE = 8.
yulyashka [42]

Answer:

A. similar - AA

there's two corresponding angle that are equal!

4 0
3 years ago
X+10=1/3(5x+10)<br><br> How do you solve this equation?
Nikitich [7]

Answer:

x = 10

Step-by-step explanation:

First, subtract 10 from both sides

Next, Simplify

Then, subtract 5/3x from both sides

After, simplify


Lastly, multiply both sides by 3


Then finally simplify for your final answer of x = 10


Hope this helps! :)

3 0
2 years ago
Read 2 more answers
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